摘要
针对满足语音端点检测的实时性要求,设计了一种基于FPGA的语音端点检测系统。介绍了语音端点检测的整个过程和一种改进的基于能量的端点检测算法,以及如何用FPGA实现该算法。设计中运用DSP Builder工具,移位法、查表法和有限状态机法,简化了硬件设计的同时也提高了运算速度。实验结果分析表明,此系统能准确地判断语音信号的起点和终点。
To meet real-time endpoint detection requirements,design an FPGA-based voice activity detection system.Speech endpoint detection process,an endpoint detection algorithm based on improved energy and how to implement this algorithm using FPGA are introduced in this paper.To obtain simplify hardware design and improves,the speed of operation,many techniques are used,such as DSP Builder tools,the shift method and look-up table method and the finite state machine method.We make simulation with a lot of noisy speech singnals,the simulation results show that the system can accurately determine the beginning and end of speech signal.
出处
《微型机与应用》
2010年第22期76-78,共3页
Microcomputer & Its Applications
基金
长沙市科技计划项目资助(K0803081-11)
